external fan unit for rbs

Ericsson Internal REQUIREMENTS SPEC.

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Prepared (also subject responsible if other) No.

EDAVGUS 1/1056-BKV 301 216/130 Uen Approved Checked Date Rev Reference

EAB/FJB/GET [Benny Jansson] EKALMAG 2013-01-29 M

Requirement Specification for External Fan Unit for RBS

Abstract

This document states the requirements for an external Fan unit for outdoor use. The Fan is an axial type, -48 VDC powered unit.


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Contents

1 Introduction ............................................................................................. 4 1.1 Purpose ....................................................................................... 4 1.2 Readers ....................................................................................... 4 1.3 Product Numbers ........................................................................ 4 1.4 Requirement tag numbers .......................................................... 5

2 Fan Functions .......................................................................................... 6 2.1 Product Description..................................................................... 6 2.2 Fan Performance at Default Voltage .......................................... 7 2.3 Fan performance deviation at other voltages ............................. 8 2.4 Impact of external forces ............................................................ 8 2.5 Signals......................................................................................... 9 2.5.1 Fan RPM control signal .............................................................. 9 2.5.2 Fan RPM characteristic............................................................. 10 2.5.3 Alarm ......................................................................................... 11

3 Design..................................................................................................... 12 3.1 Encapsulation............................................................................ 12 3.2 Dimensions ............................................................................... 12 3.3 Mechanical Interface ................................................................. 12 3.4 Weight ....................................................................................... 12 3.5 Balancing................................................................................... 12 3.6 Fire Resistance ......................................................................... 13 3.7 Electrical Interface and Connectors.......................................... 14 3.7.1 DC Power Connector ................................................................ 14

4 Electrical Design ................................................................................... 15 4.1 -48V Power System voltage ..................................................... 15 4.2 Fuses and circuit breakers........................................................ 16 4.3 Power and Current Consumption ............................................. 17 4.4 Inrush Current ........................................................................... 17 4.5 Ripple Current ........................................................................... 18 4.6 Earthing ..................................................................................... 18

5 EMC and PLD ......................................................................................... 19 5.1 General...................................................................................... 19 5.2 Performance Criteria ................................................................. 20 5.3 Emission.................................................................................... 21 5.3.1 Conducted Emission ................................................................. 21 5.3.2 Radiated Emission .................................................................... 22 5.4 Immunity.................................................................................... 24 5.4.1 Conducted immunity ................................................................. 24 5.4.2 ESD ........................................................................................... 24 5.4.3 Radiated Immunity .................................................................... 25 5.5 Power Line Disturbances .......................................................... 26

6 Environmental Requirements .............................................................. 28 6.1 Transportation and storage....................................................... 28 6.2 Operational conditions .............................................................. 28 6.2.1 General conditions .................................................................... 28


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6.2.2 Climatic Conditions ................................................................... 29 6.2.3 Biological Conditions................................................................. 30 6.2.4 Chemically active substances................................................... 30 6.2.5 Mechanically active substances ............................................... 30 6.2.6 Mechanical Conditions.............................................................. 30 6.3 Acoustic Noise .......................................................................... 31 6.4 Design for Environment Requirements (DfE) ........................... 32

7 Reliability................................................................................................ 32

8 Product safety design requirement .................................................... 33 8.1 Generic Requirements .............................................................. 33 8.2 Basic requirement ..................................................................... 34 8.2.1 International .............................................................................. 34 8.2.2 Europe ....................................................................................... 34 8.2.3 North America ........................................................................... 34 8.3 Product Safety approvals/certification requirements................ 35 8.3.1 International .............................................................................. 35 8.3.2 Europe ....................................................................................... 35 8.3.3 North America ........................................................................... 35

9 Product Marking .................................................................................... 36 9.1 Manufacturer’s label.................................................................. 36 9.2 Ericsson specific product marking label ................................... 37 9.3 Other Labels.............................................................................. 37

10 Packaging............................................................................................... 38 10.1 Single unit packaging................................................................ 38 10.2 Multi unit packaging .................................................................. 38

11 Documents ............................................................................................. 39

12 References ............................................................................................. 40 12.1 Supplementary Documents ...................................................... 40 12.2 Public References Documents ................................................. 41 12.3 References for Product Safety ................................................. 42 12.4 Ericsson Internal Reference Documents .................................. 43

13 Appendix A ............................................................................................ 44

14 Appendix B ............................................................................................ 45

15 Appendix C ............................................................................................ 46

16 Appendix D ............................................................................................ 47

17 Appendix E............................................................................................. 48

18 Terminology ........................................................................................... 49

19 Abbreviations ........................................................................................ 50

20 Revision history .................................................................................... 51


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1 Introduction

1.1 Purpose

The purpose with this document is to describe the functions and requirements for an outdoor fan.

This document states the requirements for an axial DC Fan that provides cooling air for an external application. The design of the Fan is based on requirements from the RBS system requirements.

The functional, technical and environmental requirements are specified.

The document also covers references to requirements for the Fans packaging.

1.2 Readers

• Climate unit designers • Radio base station designers • Subsystem designers • Subsystem testers • Purchasers • External suppliers of the product

1.3 Product Numbers

The product number of the complete Fan shall be BKV 301 216/130

The Fan is a physical product with R-state.


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1.4 Requirement tag numbers

Each requirement in this document is separately tagged and could be referred to without having to copy the whole text.

Example:

FAN_XXX:A_01 FAN_ Origin of the requirement XXX: Heading, function or topic of the requirement A_ Released in Revision 01 Number of the requirement

Some requirements are followed by a “Traces from /Doc Ref/ XYZ Requirement type Prefix followed by an index”, e.g. Traces from /General HW/ SRR77. The /Doc Ref/ is reference to Ericsson’s internal system documents that are found in the references. The SSR tag is a reference to requirements within that document. This nomenclature is not intended to be used by the supplier, the supplier shall always refer to the FAN_XXX:Rev_# type tag, e.g. FAN_FU:A_01.


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2 Fan Functions In this paragraph requirements are specified for functions that are vital for the Fan to operate and provide cooling air to the RBS.

The fan shall be designed to always be in operating and strive to adapt/respond to the speed control signal. Any faulty condition within the fan must not lead to a controlled halt in operation in order to avoid physical damage to the fan, with the following exemptions:

- Temperatures significantly beyond the range for Safe Function

- Voltages significantly beyond the range for normal voltages

- Product safety hazards (overheat etc)

The fan’s functionality in the RBS is considered to be critical. The fan is a replaceable wear part and its continuous function is of higher priority than actively avoiding physical damage due to wear-out and aging.

2.1 Product Description

This Fan shall primarily provide outdoor air to the external parts of an RBS. Other applications may apply. The fan has speed setting via a PWM signal and sends alarm at abnormally low speed and Fan fault.


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2.2 Fan Performance at Default Voltage

FAN_FU:J_01 Intended operating range is the area limited by the two dotted graphs and the capacity graph between point A and point B in Figure 1.

FAN_FU:J_02 The minimum capacity requirements are defined by the capacity graph between point A and B in Figure 1.

The capacity is allowed to deviate from the graph in Figure 1, for airflows above point A, and pressure above point B respectively

The capacity graph is applicable for conditions with Default voltage, see 4.1.

Capacity graph

0

50

100

150

200

250

300

350

400

0 100 200 300 400 500 600

Airflow (m3/h)

Pres

sure

(Pa)

A

B

Figure 1: Fan capacity curve, intended operation range and test point for acoustic noise


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2.3 Fan performance deviation at other voltages

FAN_FU:J_03 When operating with its intended Operation Range, the RPM is not allowed to deviate more than shown in Figure 2, when operating below or above the Default Voltage, but within normal voltage range.

Nominal

Fan RPM

Voltage

A

43,0 V

BC

Example of accepted behavour

Default Voltage

Normal voltage ragne

Figure 2: Maximum allowed deviation of RPM.

Accepted deviation depends on the Set Speed. The values for A, B and C are:

Set RPM A B C Full 5% 5% 10% Min 7,5% 7,5% 15%

FAN_FU:M_07 The RPM at startup is allowed a maximum overshoot of 10% of target RPM during the first 5s.

FAN_FU:J_04 The air flow at Min RPM, see Figure 4 shall be between 15 and 20% of maximum airflow. The requirement is applicable when operated at Default Voltage.

2.4 Impact of external forces

FAN_FU:J_05 If the fan is stopped by an external force, it shall intend to restart within 5 to 10 seconds.

FAN_FU:J_06 If the fan is decelerated by an external force, it is only allowed to stop when it has reached ≤50% of set RPM


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2.5 Signals

2.5.1 Fan RPM control signal

RPM setting shall be carried out via a PWM signal that is user generated. The control signal is generated from an open collector interface (user side). The RPM control pin shall have required voltage Vout-high when not driven (High state).

FAN_PWM:J_01 Control input shall have a pull up resistor to the internal reference voltage (Fan side).

FAN_PWM:J_02 The control signal input interface shall be able to meet a PWM signal with a frequency of 2 kHz.

FAN_PWM:M_03 The voltage and current levels shall be:

Low state: 0<Vout-low < 0.5V Ilow = 0.5 to 2.0 mA. High state: 0<Ihigh < 75 μA Vout-high = 3.0 to 6.0 V

Note 1: Vout is the voltage between pin 4 (RPM Control) and pin 3 (-48 VDC) in the fan connecter. When the fan I simulated with a 4.7 kΩ pull-up resistor (Rinternal in Figure 3) at the open collector/drain connection point the characteristics of the user generated PWM signal will be: Trisetime and Tf alltime is < 10 μs. The pull-up resistor is connected to a test voltage 5 V above pin 3 (-48 VDC). Duty cycle 50 %.

Note 2: The electrical PWM interface requirements needs to be fulfilled for all fan fault conditions for proper fault detection by the connecting interface. This is because the combination of fault- and PWM-signal is used to differentiate between alarms (fan connected and fan fault).

Figure 3 Functional schematic of PWM interface


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2.5.2 Fan RPM characteristic

The relation between PWM signal and fan RPM is defined in the table below, and in Figure 4. The values apply for a fan supplied with Default voltage. For other voltages refer to FAN_FU:J_03

FAN_PWM:K_04 The PWM signal shall generate a RPM setting as below;

PWM signal RPM

0 – 10% Max RPM 75 – 85% Min RPM 85 – 95% Zero RPM 95 – 100% Max RPM

See also Figure 4

FAN_PWM:L_05 From 10 to 75% PWM signal, there shall be a linear RPM reduction relation. See Figure 4

FAN_PWM:K_06 A hysteresis of <±2% and PWM measuring tolerance of max 2% shall be implemented.

10 20 30 40 50 60 70 80 900 100

Fan

spee

d in

RP

M

Max

Min

0

PWM signal in %

Figure 4: Fan speed as function of PWM signal


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2.5.3 Alarm

2.5.3.1 Alarm conditions

FAN_ALA:J_01 If the actual speed is <62% of the set RPM for 10±1 s, the fan shall send an alarm.

FAN_ALA:J_02 If the alarm is sent, it shall not cease before the actual fan speed is >67% of the set RPM

2.5.3.2 Alarm signal

FAN_ALA:J_03 The alarm signal shall be referenced to pin 3 (-48 VDC) in Figure 5.

FAN_ALA:J_04 The alarm signal shall be as follows:

Alarm (High impedance) Ileak < 75 µA @VOU T between 30 to 60 VDC

No alarm (Low impedance) VOUT 0.8 to 0 V @ 2mA Isink max < 20 mA

VOUT is defined between Pin3 and Pin 2, see Figure 5

Figure 5 Functional schematic of the alarm interface

FAN_ALA:J_05 Max capacitance of the alarm interface shall be 10 nF


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3 Design

3.1 Encapsulation

FAN_DES:J_01 Fan shall comply with the following standards:

IP 55 according to IEC 60 529 IP 55 according to EN 60 529

See also section Product Safety for requirements about encapsulation

3.2 Dimensions

FAN_DES:K_02 Dimensions and tolerances for the Fan and its parts are described in the figure in appendix A.

Total cable length, C 180 ± 10 mm Position of label, L 90 ± 5 mm

3.3 Mechanical Interface

FAN_DES:J_03 Positioning and tolerances for mechanical interfaces such as overall dimensions, cable connectors, fixing screws, joints etc are described in the appendix A.

3.4 Weight

FAN_DES:J_04 The maximum weight of the Fan, including cable, shall be < 1 kg.

Consideration shall be taken to reduce the weight as much as possible.

3.5 Balancing

FAN_DES:J_05 The fan shall be balanced according to [ISO 1940-1]. Balance quality grade G6.3 shall be applied to all manufactured units.


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3.6 Fire Resistance

FAN_DES:J_06 The fire resistance of material, components and cables shall be in compliance against following product standards. The materials shall be documented in the corresponding report under section “Materials”:

Basic standard

IEC 60 950-1, (2nd edition)

European standard

EN 60 950-1, (1st and 2nd Editions)

North American standards

UL Std No. 507- 9th Edition CSA Std C22.2 No. 113-10

Traces from /ADD_ENV/ NFR3512

FAN_DES:J_08 As a basic requirement all material and components shall be of V-1 / VTM-1 (and equally) or better.


FAN_DES:J_09 Fire resistance test methods according to above product safety standards.



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3.7 Electrical Interface and Connectors

3.7.1 DC Power Connector

FAN_DES:J_10 Fan wire shall be connected to housing as shown in Figure 6, and configured according to Table 1. All wires shall be covered by one single shrink tube, ending 15±5 mm from the connector, see Appendix A

Pin Function Min area

1 - 48 VDC_RTN (0 VDC) AWG 22

2 Alarm AWG 22

3 -48 VDC AWG 22

4 Speed control AWG 22

Table 1: Pin functions

The connector is made with sealing rubber plugs between housing and the terminals. Connector manufacturer is TYCO electronics, and specified part numbers are:

Plug housing: No.350779-1 UL94V-0 Sealing interface No.794273-1 Urethane foam Sealing wire No.794274-1 Silicone rubber Connector socket No.350851-2 AWG 24-18

Figure 6. DC power connector

FAN_DES:J_11 All four cables shall be covered by one tubing, ∅ 5.0 ± 1 mm.


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4 Electrical Design The requirements in this chapter shall be complied with during normal voltage range and operating range if not stated otherwise.

4.1 -48V Power System voltage

FAN_ELEC:K_01 The fan shall be designed for a power source with the following properties:

Default voltage: -54.5 VDC Nominal voltage -48 VDC Normal voltage range: -38.0 to -58.5 VDC Abnormal / Non destruction voltage range: 0 to -38.0 VDC and -58.5 to -60.0 VDC

FAN_ELEC:J_02 Source impedance is mainly characterized by an inductance of 2 to 30 μH.

Traces from /POW INT/NFR3936

FAN_ELEC:J_03 Non-reoccurring (T>>1s) DC Source voltage change when -48V Power system voltage is within the Normal range:

Amplitude for fall and rise time 6V ±10% Transition rate (dV/dt) 3 to 7 V/ms

When applying this voltage change to the fan the input current shall be within the level required in FAN_ELEC:J_09

Traces from /POW INT/NFR2532

FAN_ELEC:J_04 Ramp-up time of the DC Source 0 µs to 300 ms (10 to 90 % of default voltage)

Traces from /POW INT/ NFR3127


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4.2 Fuses and circuit breakers

FAN_ELEC:J_05 The Fan shall be designed and certified with an external fuse or circuit breaker with the following rating:

Fuse rating Maximum 20 A Breaking capacity > 3 kA

Characteristic: Fuse gL-gG-gD type according to IEC 60 269-1 (gD is also meeting UL 248-8) or Hydraulic-magnetic circuit breaker according to IEC 60 947-2, UL 489A with characteristics curve 3 (according to Appendix B).

Reference to /PS DC Circuit Breaker/

Note: The short circuit current from the -48V Power System interface to the fan will be ≤ 1 kA.

FAN_ELEC:J_06 The fan shall not break an external circuit breaker of 10 A (curve 3, see Appendix B) during operation on normal voltage range and power line disturbances, see chapter 5.5 PLD.


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4.3 Power and Current Consumption

FAN_ELEC:J_07 Maximum DC power consumption at 0 RPM shall be 2 W.

FAN_ELEC:J_08 Maximum DC power consumption at Max RPM, within the operating range and within the voltage range -58.5 to -43.0VDC shall be 55 W. In the voltage range -38.0 to -43.0VDC the requirement FAN_ELEC:J_09 is valid.

FAN_ELEC:J_09 The current consumption during operation shall not exceed 1,3 A. This is valid for both continuous (stable) speeds as well as for change of speed.

4.4 Inrush Current

FAN_ELEC:J_10 The fan shall be possible to hot insert/hot extract. This also means that it shall not be any destruction caused by arching etc, when replacing or inserting a fan.

Traces from /IWD_-48/ IWD_48VOUT:A_008

FAN_ELEC:J_11 a) Maximum allowed inrush transient at voltage appliance:

0 - 0.1 ms duration 1 Ws (J)

Maximum allowed inrush current at voltage appliance:

0.1 to 100 ms: It/Im ≤ 2 >100ms: It/Im ≤ 1

It is the maximum instantaneous inrush current. Im is the maximum continuous current for the fan in normal voltage range.

Measurement method according to [ETSI EN 300 132-2]

Traces from /IWD_-48/ IWD_48VOUT:A_009

FAN_ELEC:J_12 b) The maximum inrush transient caused by input filter capacitance <25µF (0.05Ws) does not need current limitation.

It is allowed to combine a) and b). Example: An input filter <25µF without current limitation followed by a current limiter for bulk capacitors >25µF.

FAN_ELEC:J_13 Max fan peak current shall be 4 A for <100 ms when fan motor is stopped by external force.


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4.5 Ripple Current

FAN_ELEC:J_015 Maximum allowed ripple current caused by the fan unit, at normal voltage range and source impedance, according to chapter 4.1, shall be

Maximum Ripple Current (Ap-p): 100 % of Fan Unit max current value1 Frequency range: <150 kHz Current slew rate (di/dt): <25 mA/µs 2

1 Note: 0 to100 % and 100 to 0 % current step change 2 Note: Ripple currents with lower amplitude superimposed on the main ripple current can be disregarded.

4.6 Earthing

FAN_ELEC:J_16 The fan will not intentionally be connected to earth, it is by means of Product Safety unearthed. The fan shall be designed in accordance with this design requirement. The housing shall be electrically insulated from the cables and fulfill the following:

Dielectric strength For 1 minute, housing to wires >500 VAC Insulation resistance At 500 VDC housing to wires >10 Mohm

When mounted in its in-use position, the fan chassis may be connected to earth. Connection to earth shall not affect the performance and characteristics of the fan.


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5 EMC and PLD

5.1 General

The Fan shall fulfil the EMC requirements as stand alone unit level. Test conditions shall be described in the qualification test reports.

During EMC and PLD testing the following shall be considered:

• During EMC and PLD test applicable output values shall be measured and recorded.

• When specifically stated, frequencies outside the standardized frequency range shall be regarded, in order to ensure requirement fulfillment of a population of units with a national distribution of radiated emission characteristics. Preferably a measurement shall be done, but can if applicable be replaced by a presentation of estimated results.

• For emission tests operation modes (Fan speeds etc) shall be chosen with consideration to the worst-case conditions with respect to maximum measured levels.

• For immunity tests operation modes shall be chosen with consideration to the worst-case conditions with respect to maximum impact on the Fan’s function. Minimum and maximum speeds shall be avoided.

Requirements in this chapter are developed from /GS_EMC/ and are in some cases modified

FAN_EMC:J_01 For the radiated phenomena, except for FAN_EMC:J_015 (“H-field”) the test setup shall be built according to appendix C.

FAN_EMC:J_02 For the conducted emission the test setup shall be built according to appendix D.

FAN_EMC:J_03 ESD test points for discharge application shall be described in QTS for each unit.

FAN_EMC:J_04 Acceptance tests shall be performed / documented at qualified EMC laboratories.

FAN_EMC:J_05 Measurement uncertainty shall be treated as defined in CISPR 16-4-2 [CIS-1642]. The actual status of the laboratory shall be documented in the reports.


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FAN_EMC:J_06 According to EN 55022 paragraph 7.2.2, subsequent tests are necessary from time to time on units taken at random from production to ensure a stable EMC performance in serial production. The first test shall be performed on pre-serial units before PRA. The supplier shall propose an EMC qualification plan for serial units that shall be approved by the responsible design/product owner at Ericsson AB

FAN_EMC:J_07 EMC emission verification shall be made utilizing the statistical method described in Appendix E

The calculated tolerance to requirement limits shall be stated in the test reports. The margin between the test results and the requirement limits shall be equal to this calculated tolerance or larger.

5.2 Performance Criteria

Performance criteria for the EMC immunity requirements, unless else is specified separately, are:

• Criteria A: The Fan shall continue to operate as intended. Neither change of the actual operating state, false alarms nor loss of function is allowed under the test.

• Criteria B: Full function of the fan is not guaranteed and performance (RPM) may degrade maximum 5 % during test. False alarms are not allowed during test. After the test no manual intervention is needed to restore the full performance of the fan.

Monitoring methods to ensure fulfilment of the criteria shall be described in the QTS


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5.3 Emission

5.3.1 Conducted Emission

DC Power in port

DC Power connector – DC power in pins

FAN_EMC:J_08 Voltage

Frequency range Quasi-peak Average [MHz] [dBuV] [dBuV]

0.14 to 0.15* 63 53

0.15 to 0.50 63 to 53 53 to 43

0.50 to 7.0 53 43

7.0 to 30.0 57 47

30.0 to 31.0* 57 47

Measurement method according to CISPR22 [CIS-22].

The same resolution bandwidth shall be used in the frequency bands outside the regular frequency bands as in conjunction with the regular frequency band

*These frequency bands can not be included in an accredited report.

Test setup according to Appendix D. NOTE: Two measurements shall be made: chassis connected to ground; and chassis isolated from ground


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5.3.2 Radiated Emission

FAN_EMC:J_09 Radiated Emission on fan level

Frequency range Quasi-Peak Average Peak [GHz] [dBµV/m] [dBµV/m] [dBµV/m]

0.028 to 0.030* 30

0.030 to 0.250 30

0.250 to 1 37

1 to 1.02* 37

1 to 3 44 64

3 to 6 44 64

6 to 5th harmonic 44 64

3m distance from antenna.

Measurement method to 6 GHz according to CISPR22 [CIS-22].

Measurement method from 6 GHz according to ANSI 63.4 [ANSI-634].

The same resolution bandwidth shall be used in the frequency bands outside the regular frequency bands as in conjunction with the regular frequency band.


External cables shall be arranged according to Appendix C.


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FAN_EMC:J_010 Radiated Emission on fan level

Frequency range Level Detector [MHz] [dBµV/m]

490 to 500* 53 peak, max hold

500 to 1000 53 peak, max hold

1000 to 4000 59 peak, max hold

Measurement method according to CISPR 16-2-3 with the following adjustments:

• Resolution bandwidth: 3MHz

• Measurement time, at each step: 1s

• Step must be smaller than 0.8 x 3 MHz

3m distance from antenna.

The same resolution bandwidth shall be used in the frequency bands outside the regular frequency bands as in conjunction with the regular frequency band.




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5.4 Immunity

Performance criteria and measuring methods shall be described in QTS for fan.

5.4.1 Conducted immunity

DC Power in and Signal/Control Ports

DC power connector – all pins simultaneously

FAN_EMC:J_011 Burst (EFT), ± 1.0 kV, test according to /IEC 61000-4-4/ [IEC-6144]. Performance criteria B. Test setup with capacitive clamp shall be used.

FAN_EMC:J_012 RF common-mode, 3 Vrms, 150 kHz – 80 MHz, test according to /IEC 61000-4-6/ [IEC-6146]. Performance criteria A.

5.4.2 ESD

FAN_EMC:J_013 ESD, +/- 8 kV, contact discharge, +/- 15 kV, air discharge, test according to IEC 61000-4-2 [IEC-6142], Figure 7: “Example of a test setup for ungrounded floor-standing equipment.” (Note: version 2008). Performance criteria B.

This requirement is applicable on all surfaces, cable isolation, contact cases etc. reachable with either method above.

The requirement is not applicable on ports without any mounted connector or connector pins in such a port.


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5.4.3 Radiated Immunity

Performance criteria and measuring methods shall be described in QTS for fan.

FAN_EMC:J_014 AM modulation

Frequency range E [GHz] [V/m]

0.08 to 3 10

Test according to IEC61000-4-3 [IEC-6143]

Performance criteria A.


FAN_EMC:J_015 H-feild

Magnetic field 50 & 60 Hz, 30 A/m

Test according to IEC 61000-4-8 [IEC-6148]

Performance criteria A.

Only fan body needs to be exposed.


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5.5 Power Line Disturbances

Each fan shall be designed to meet the following Power Line Disturbance (PLD) requirements as specified in /GS_PLD/.

Each fan is defined as a sub-unit, Level C.

During PLD tests DC power shall be connected to the fan.

PLD tests shall be performed on the DC supply voltages -48 VDC interface, -48 VDC to -48 VDC RTN (0) if nothing else is specified. The applied voltage shall be -54.5 VDC. External fuse according to FAN_ELEC:J_06 shall be used

Test criteria

• Generally all criteria’s according to chapter 5.1 apply for all PLD test cases

• Additional criteria for E3.5 Surge: Short circuit on the input or reverse input voltage up to +125V shall not generate any reverse currents >It [A]

• During tests, the fan speed is allowed to vary. After test, the fan speed shall return to the same value as before the tests. Exceptions: E9.2 and E9.4. During these the fan speed shall NOT vary

Requirements for Normal operation (E):

FAN_PLD:J_01 E3.5 Surge Traces from /IWD_-48/ IWD_48VOUT:A_016

FAN_PLD:J_02 E7.1 Under voltage Traces from /IWD_-48/ IWD_48VOUT:A_017

FAN_PLD:J_03 E7.3 Under voltage Traces from /IWD_-48/ IWD_48VOUT:D_049

FAN_PLD:J_04 E8.2 Under/Over-voltage Traces from /IWD_-48/ IWD_48VOUT:A_018

FAN_PLD:J_05 E9.2 Voltage ripple Traces from /IWD_-48/ IWD_48VOUT:A_019

FAN_PLD:J_06 E9.4 Voltage ripple Traces from /IWD_-48/ IWD_48VOUT:A_020

FAN_PLD:J_07 E11 Ramp up Traces from /IWD_-48/ IWD_48VOUT:D_050

Requirements for Non-Destruction (D) - Condition

FAN_PLD:J_08 D7.2 Slew rate Traces from /IWD_-48/ IWD_48VOUT:A_021


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FAN_PLD:J_09 D11.1 Over voltage Traces from /IWD_-48/ IWD_48VOUT:A_022

FAN_PLD:J_10 D11.2 Over voltage Traces from /IWD_-48/ IWD_48VOUT:A_023

FAN_PLD:J_11 D12.2 and D12.4 Surge Traces from /IWD_-48/ IWD_48VOUT:D_051 Note 1

FAN_PLD:J_12 D13 Latch-up Traces from /IWD_-48/ IWD_48VOUT:A_025

FAN_PLD:J_13 D14.2 On-Off cycling Traces from /IWD_-48/ IWD_48VOUT:A_026

Note 1: D12.2 and D12.4 is covered by E.8.2

Methods for test result evaluation

There are three different ways for a black-box unit supplier to achieve compliance (Pass) to the E3.5 requirement as specified in 11/1056-HRB 105 600, revision C and D.

Note: Additional compliance requirements for E3.5 may apply to certain products (if specified so in the units’ requirement specification). How to comply with such additional compliance criteria are not accounted for here.

1. Demonstrate that the test generator is able to generate the defined voltage waveform at open-circuit. Attach the EUT and regulate the source impedance of the generator (can be done by connecting a small resistor in series with the generator). Measure the over- and under voltage energy to the EUT during the 0.5 ms that the voltage is changed, both from 54.5 to -100V and from 54.5 to and +100V respectively. If the pulse energy is > 1.8 Ws, the EUT is considered compliant. If it is not, gradually reduce the generator impedance towards zero until the pulse energy to the EUT is > 1.8 Ws. If the EUT can not absorb the desired pulse energy; move on to step 2. The EUT will in many cases not be exposed to the defined open circuit voltage waveform, but this is perfectly OK.

2. Expose the EUT to the defined open-circuit voltage waveform (no need for energy measurements/calculations). If the required waveform and its specified slew rates are achieved, the test method is considered sufficient.

3. If both test methods above do fail: Based on oscilloscope screen dumps; present the calculated over and under voltage pulse energy to the EUT and the achieved slew rates. The verification results can possibly be considered OK by Ericsson. If so, the verification report will be allowed to state the result as Pass (compliant), though with an added remark stating achieved energy and slew rate


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6 Environmental Requirements The requirements in this section are derived from /General HW/.

6.1 Transportation and storage

FAN_ENV:J_01 Environmental requirements for transportation and storage stated in sections 2.4.1 “Transportation” and 2.4.2“Storage” in /General HW/ shall be fulfilled.

6.2 Operational conditions

6.2.1 General conditions

Coordination between requirements could be done by supplier so that only the tests with the most stringent requirements are carried out. These tests shall be approved by Ericsson.

The equipment must in all situations fulfill legal requirements and not become hazardous to people.


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6.2.2 Climatic Conditions

FAN_ENV:M_02 Requirement:

Note 1. Operation condition Unit Value Normal operation Temperature °C -40 to +45 Relative humidity %Rh 5 – 100 Absolute humidity g/m3 0.26 – 25 Change of temperature °C/minute 0,5 note 2 Exceptional/ Safe function Temperature °C -40 to +60 Relative humidity %Rh 5 – 100 Absolute humidity g/m3 0.26 – 25 Change of temperature °C/minute 0,5 note 2 Non destruction Temperature °C -40 to +70 Relative humidity %Rh 5 – 100 Absolute humidity g/m3 0.26 – 25 Change of temperature °C/minute 0,5 note 2 Air pressure: kPa 70-106

Note 1: The temperature versus humidity shall be plotted according to the IEC constitutional diagram area that is stated in the requirement. It is the union of the requirements that must be verified.

Note 2: Average over a period of 5 minutes

Testing methods: According to relevant IEC 60068-2 standard.


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6.2.3 Biological Conditions

The severity of these requirements is in conformity with: IEC 60721-3-4 class /4B1/ and ETS 300 019-1-4 Class 4.1.

FAN_ENV:J_03 Requirement:

Environmental parameters Unit

Flora Presence of mould, fungus, etc.

Fauna Presence of rodents and other animals, excl. termites

Testing methods: The characteristics severities should be considered when choosing components and materials. Therefore no tests are required at the equipment level.

6.2.4 Chemically active substances

FAN_ENV:L_10 A corrosion test according to ISO 21207, method B with at least 5 cycles, shall be performed. The result of the test shall be provided to Ericsson for approval.

FAN_ENV:J_04 Requirements stated in section 2.4.3.3 “Chemical Active Substances” in /General HW/, applicable for “Units exposed to an outdoor environment”, shall be fulfilled.

6.2.5 Mechanically active substances

FAN_ENV:J_05 Requirements stated in section 2.4.3.4. “Mechanically active substances” in /General HW/, applicable for “Units exposed to an outdoor environment”, shall be fulfilled.

6.2.6 Mechanical Conditions

FAN_ENV:J_06 For vibration sinus, shock, seismic exposure and other mechanical requirements in operation, the fan unit shall fulfill requirements in section 2.4.3.5 “Mechanical Conditions” in /General HW/.

FAN_ENV:J_07 The same fan unit shall be used throughout all tests specified in FAN_ENV:J_06.

FAN_ENV:J_08 The vibration sinus test specified in FAN_ENV:J_06 shall be performed for ≥60 min in each x-, y- and z-direction.

FAN_ENV:J_09 The shock test specified in FAN_ENV:J_06 shall be performed with ≥10 shocks for each positive/negative x-, y- and z-direction.


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6.3 Acoustic Noise

FAN_ACO:J_01 Requirement for acoustic noise at full fan rotation speed

Parameter Value Unit

Noise: (sound power) 7,4 LWA(Bel;A-weighted)

Tonal elements shall be kept to a minimum.

FAN_ACO:J_02 At lower fan rotation speeds the acoustic noise shall decrease according to the relation:

ΔLw = 50 log ( N / Nf ull ) (dB(A))

ΔLw Deviation in A-weighted noise between speeds N and N100 N Fan rotation speed, lower than N100 N100 Full fan rotation speed

Test setup

Tamb = room temperature (22 ± 3) °C.

The fan shall be mounted as specified in ISO 10302. The “Points of operation” according to ISO 10302 chapters 7.2 shall be replaced / supplemented with the following operation points:

• 4-5 points among the utilized operation range at full speed • 4-5 points among a continuous system graph, with extra consideration

for speeds where tonal elements become influencing or dominant.

Refer to Figure 1 for details

Testing methods:

Test method shall be according to ISO 3741 or equivalent standard


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6.4 Design for Environment Requirements (DfE)

FAN_DFE:J_01 Design for Environment according to reference /DfE/ sections 5.2 and 5.3 shall be fulfilled for sections applicable for the design of the Fan.

Traces from /General HW/ SSR1930

7 Reliability

FAN_REL:J_01 A fan exposed to an outdoor environment shall have a life-time (electrical and mechanical) of greater than or equal to L15 ≥ 83 000 hours at a cooling supply air of 45 degree Celsius.

This shall be calculated according to Weibull distribution, Weibull Beta slope ≥1.4 in fan specs. Life time considered to be ended when running current has increased 30% of initial value or noise level has increased 3dB (A). The life time applies to normal operation of the Fan Unit.


Test result criteria, based on number of samples in test and temperature exposure conditions, are not specified here, but must be agreed between Ericsson and the supplier before test commences.

FAN_REL:M_02 The fan shall be able to toggle on and off down to a cycle period of 10s over a long time interval without a degradation in performance in the temperature range of -40 to +17°C.

This shall be verified by 5 fans running the cycle: 5s at 80% PWM and 5s at 90% PWM. The cycle shall be repeated 400 000 times at default voltage. The running current consumption shall not have increased with more than 10% after completing the test.


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8 Product safety design requirement The fan shall be designed to fulfill all requirements as defined in this section.

8.1 Generic Requirements

FAN_SAF:J_01 The fan unit may be placed outside or as a part of a fire enclosure in the Support systems and shall therefore comply with flammability requirement of minimum UL 94V-1 (although UL 94V-0 is preferred). The Fan unit will however never be exposed to direct sunlight (UV) in the final enclosure.

FAN_SAF:J_02 All certificates and reports for mentioned safety standards in this safety chapter shall be presented in full and in PDF format.

FAN_SAF:J_03 Altitude requirement

Fan unit shall be designed to be operated up to 3000 m above sea level. Minimum clearances shall be multiplied by the factor 1.14. The calculated minimum clearance using this multiplication factor shall be rounded up to the next higher 0,1 mm increment.

(Source clause 2.10.3.1 in IEC 60950-1:ed.2 2005)

Required air pressure is 70-106 kPa for indoor and outdoor equipment which correspond to an altitude of 3000 to 0 m above sea level, according to IEC 60664-1

Traces from /GS_SAF/ NFR2842

FAN_SAF:J_04 The fan unit shall be certified as a stand alone unit.

FAN_SAF:J_05 During operation the fan unit shall not rely on any cooling by radiation or conduction.

FAN_SAF:J_06 The fan unit shall be designed for use in environment classified as Pollution degree 2.


FAN_SAF:J_19 The fan shall be safety certified with an external fuse according to FAN_ELEC:J_05 and with the maximum allowed fuse value shall be stated in the safety reports.


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8.2 Basic requirement

8.2.1 International

FAN_SAF:J_07 Fan unit intended to be built in/used with the Support systems shall comply IEC 60950-1/A1: 2009


FAN_SAF:J_08 Outdoor specific requirements

IEC 60529:2001

Required encapsulation class minimum IP55M

Both the front and backside of the fan unit shall be subjected to the water jet.


8.2.2 Europe

FAN_SAF:J_09 Fan unit intended to be built in/used with the Support systems shall comply shall EN 60950-1/A1:2010+A11:2009 +A12:2011.


FAN_SAF:J_10 Outdoor specific requirements

EN 60529:1991/A1:2000 Required encapsulation class minimum IP55M

Both the front and backside of the fan unit shall be subjected to the water jet.


8.2.3 North America

FAN_SAF:J_11 Fan unit intended to be built in/used with the Support systems shall comply with:

CSA Std C22.2 No. 113-10 – Fans and Ventilators and UL Std No. 507- 9th Edition – Electric Fans, including clause 38

The fan unit is to be considered as a “Low Voltage fan” mounted in an enclosure giving protection to direct sunlight, but with the possibility of incoming water. The fan unit shall therefore be certified under UL 507 as a “Low voltage fan” with the additional water spray test according to clause 38.

FAN_SAF:J_12 Marking


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Any necessary caution or warning markings shall be in English and French for the Canadian Market CSA-C22.2 No. 113-10


8.3 Product Safety approvals/certification requirements

FAN_SAF: K_13 The fan unit shall be certified for its Nominal voltage according to section 4.1 Voltage tolerances during tests shall be as specified by the Normal voltage range, according to section 4.1. For other parameters (temperature etc) the fan unit shall be certified for the intended use within respective normal operation ranges according to this requirement specification. The ranges shall be stated in the test reports


8.3.1 International

FAN_SAF:J_14 The fan unit shall be CB certified.

The CB certification shall cover relevant IEC standards and include national deviations against relevant IEC standards as stated in the CB bulletin.


FAN_SAF:J_15 An outdoor fan unit shall be followed by a test report issued by a NB/NCB showing compliance against IEC 60529:2001 and required encapsulation class.


8.3.2 Europe

FAN_SAF:J_16 An outdoor fan unit shall be followed by a test report issued by a NB/NCB showing compliance against EN 60529:1991/A1:2000 and required encapsulation class.


8.3.3 North America

FAN_SAF:J_17 The fan unit shall be NRTL listed for US and Canada.


FAN_SAF:J_18 The fan unit shall be NRTL listed as Recognized Components for US and Canada.



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9 Product Marking FAN_MARK:J_01 Ericsson shall approve the labels, its contents and its positioning.

FAN_MARK:J_02 The material for all labels shall be UL-recognized and it shall be chosen with respect to the requirements from the specified International Standards for Safety (IEC 60 950-1).


FAN_MARK:J_03 The labels and its marking shall be resistant to mechanical wearing that can arise at normal handling, storage and operation. The marking must not be affected either by water, trichloroethylene, ethyl alcohol or perchloroethylene. The marking shall be readable throughout the Fan lifetime.

FAN_MARK:J_04 See Appendix A for positioning of marking labels.

9.1 Manufacturer’s label

FAN_MARK:K_05 The background of the label shall be white or light grey, with black text and the following data shall be specified on the label

• Name of the SUPPLIER or trade mark (agreed with Ericsson) • Country of origin, In English, with format: “Made in Sweden” • Model or type number • Nominal voltage • Current • Wire colour coding • Mark of approval (CE, UL/NRTL etc.) • Supplier’s serial or batch number (if applicable) • Date of manufacture • Any additional data required by the design

In addition, any data with reference to the specific product safety certification requirements may be printed, such as:

• Maximum operation temperature • Product, model or type number stated in the product safety

certificates, if other than the Supplier’s product code above.



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9.2 Ericsson specific product marking label

FAN_MARK:K_06 The product marking label shall be placed on the cable. See 3.2 and Appendix A for specification on placement. The label shall be fixed either perpendicular to the cable (Alternative 1) or aligned with the cable (Alternative 2). Text shall be oriented as shown on “Label 2”.

FAN_MARK:K_07 The product marking label shall be fixed onto a holder that is strapped to the cable. Alternatively, labels that include holder functionality is accepted

FAN_MARK:L_08 The following bar-code label and print file shall be used:

SVF 191 047/2

Refer to 1095-SVF 191 047/1 for details for suitable label and print file

Figure 7. Example of product marking label


9.3 Other Labels

FAN_MARK:J_09 Warning signs for hazardous voltage may be applied if required by the safety standards applied for certifications. Other warning or information signs or instruction text labels shall only be applied if explicitly required.

[)>Rs06G

s 18VLELMEG

s 1P<Product number>G

s 21P<R-state>G

s 22P<Marking Text>G

s 12D<Man.fact. Date>G

s S<Serial number> R

s E

OT

(1P)<Product number> <Lead Free Solder>

(21P)<R-state> (12D)<Manufacturing Date>

(22P)<Marking Text> Made in <Country Name>

Ericsson e-con (S)<Serial number>


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10 Packaging

10.1 Single unit packaging

Single unit packaging of fans is handled internally by Ericsson.

FAN_PAC:J_01 Single unit fan shall be packed according to instructions in /Single pack/

10.2 Multi unit packaging

The following requirements apply for multi unit packages intended for serial deliveries to Ericsson factories globally.

FAN_PAC:J_02 Package shall be designed in compliance with /GS Packaging_2/. Further information on packaging design can be retrieved from Ericsson document /Packaging instructions/.

Traces from /General HW/SSR751

FAN_PAC:J_03 The size of the product and product packaging, including outer packaging (and pallet), (inbound as well as outbound) shall be optimized to fit (even divided with) normal transportation standards, i.e Euro pallet, Airline limitations etc.

Boat: containers: 1200 x 800 x 2250 mm (L x W x H)

Truck: pallet size goods: 1200 x 800 x 2700 mm (L x W x H)

Flight: lower deck palette: 3020 x 2080 x 1600 mm (L x W x H).


FAN_PAC:J_04 The packaging shall be labeled so it is possible to identify the contained unit/contents without opening the package. Labeling shall be according to /Marking of Product/



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11 Documents The supplier shall inform Ericsson about the documents planned for certification of the product, QTP.

FAN_DOC:J_01 The following qualification records, type approval reports and certificates documentation shall be provided to Ericsson:

• IEC/EN Test Report

• CB Certificate, including all national deviations

• NRTL Listing Report

• ATM (Authorization to Mark) letter from NRTL

• Qualification Test Record on all requirement tags

The documents shall be provided in electronic format as PDF.


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12 References

12.1 Supplementary Documents

The following Ericsson documents are referred to in this Requirement Specification.

Supplementary documents are available via PIS area.

Reference tag in this document

Document Number and Title Rev

/General HW/ 15/1056-CRX 901 187 (Safety chapter excluded)

G

/DfE/ 1056-FAU 104 04, Generic DfE requirements applicable to all Ericsson products.

C

/GS_PLD/ 11/1056-HRB 105 600 Power Line Disturbance Requirements for RBS Products

D

/GS Packaging_2/ 2/1056-CSX 101 58 Uen, General Requirements for Packaging Material design for Packaging used in Ericsson Supply

A

/Packaging Instructions/

125 23-LXE 107 268 Packaging Instructions Appendixes: 1/125 23-LXE 107 268 - Methods 2/125 23-LXE 107 268 – 1301-templates

G A C

/Marking of Product/ 102 01-1003 Marking of Product, Handling and Transport Unit Package

AD

/Single pack/ 1095-RTK 293 03/1 Packing set for fans

R1A

Product marking label 1095-SVF 191 047/1 Product identity marking

-


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12.2 Public References Documents

The following public documents are referred to in this Requirement Specification.

[ETSI EN 300 132-2]

Power supply interface at the input to telecommunications equipment; : Operated by direct current (dc)

[IEC-6142] Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement techniques - Electrostatic discharge immunity test (IEC 61000-4-2:2008)

[ISO 1940-1] Mechanical vibration – Balance quality requirement for rotors in a constant (rigid) state. (ISO 1940-1:2003(E))

[CIS-22] CISPR 22, Information technology equipment Radio disturbances characteristics Limits and methods of measurement

[ANSI-634] ANSI 63.4 American National Standard for Methods of Measurement of Radio-Noise Emissions from Low -Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz


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12.3 References for Product Safety

CSA Std C22.2 No. 113-10 - Fans and Ventilators

CSA-C22.2 No.60950-1-07, Ed. 2 Information Technology Equipment - Safety - Part 1: General Requirements

EN 60529:1991 / A1:2000 Degree of protection provided by enclosures (IP code)

EN 60 950-1:ed.2 2006 / A11 / A1:2010 Information technology equipment – Safety – Part 1: General requirements

IEC 60 529: 2nd edition: 1989 with amendment No.1: 1999 Degree of protection provided by enclosures (IP code)

IEC 60 950-1:ed.2 2005/A1:2009 Information technology equipment – Safety – Part 1: General requirements

IEC 60 664-1 "Insulation coordination for equipment within low-voltage systems - Part 1: Principles, requirements and tests "

UL Std No. 507- 9th Edition - Electric Fans


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12.4 Ericsson Internal Reference Documents

Contents in this Requirement Specification have been derived from the following Ericsson internal documents

Reference tag in this document

Document Number and Title Rev

/ADD_ENV/ 17/1056-HRB 105 600

C

/GS_EMC/ 22/1056-HRB 105 600

E

/IWD_-48/ 5/155 19-HRB 105 600

D

/GS SAF/ 14/1056-HRB 105 600

D

/POW INT/ 10/1056-HRB 105 600 Power Interface requirements for RBS 6000

G

/PS DC Circuit Breaker/

1301-NFS 810 20 Product Specification for DC Circuit Breaker

K


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13 Appendix A

180 +/-0,5190 +/-0,5

55,5

55,5

50,8

+/-0

,5

7,5

+/- 0

,5

Lenght C

Label 1

171,5 +/-0,5

Labe

l 2

Label 2

Length L

Alt. A

Alt. B

Figure 8 - FAN main dimensions


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14 Appendix B Figure 9 specifies the tripping characteristic of curve 3 Circuit breaker. The lines represent the minimum and maximum tripping limits.

Figure 9: Curve 3


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15 Appendix C Setup for radiated phenomena.

Figure 10:


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16 Appendix D Figure 11 shows the setup for conducted emission

Fan

AMN

50 mm isolation

Ρ + & - power lines to AMNΡ The resistors are a suggestion on how to simulate the

controller. When a speed other than maximum is wanted, the 47 ohm resitor has to be replaced by a pulse generator. Other circuits are possible, but the background noise needs to be considered.

Ρ Two test conditions apply:meassured with fan chassis a) connected to ground b) dissconnected from ground

AMN

10 kOhm

47 Ohm

+

-PWMAlarm

800 mm

200 mm

Measurement 1

Measurement 2

+

-

Figure 11.


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17 Appendix E Statistical method – unit level

EMC emission verification on a unit level shall be made utilizing the statistical method described in EN 55022 paragraph 7.2.3.


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18 Terminology

EMC The ability of an equipment or system to function satisfactorily in its electromagnetic environment without introducing intolerable electromagnetic disturbances to anything in that environment

Exceptional / Safe function Full functionality Environmental stress above the limits for normal operation where a unit shall continue to function during the stress, but performance or capacity may be reduced. Any changes of performance / capacity shall be approved by system responsible. Only alarms related to the reduction of performance and capacity are allowed here. The unit shall under no circumstances behave illegally. Reduction of performance or capacity shall be approved by RBS system product owners and documented as typical value. When the environmental stress has restored to normal conditions, performance / capacity as specified shall automatically be achieved.

Inrush Current The peak instantaneous input current drawn by the power supply at switch on.

Non destruction - Environmental

Reduced functionality and performance Environmental stress above the limits for normal function during which no function is guaranteed and performance may degrade in an unspecified manner. The fan must in all situations fulfill legal requirements and not become hazardous to people. When the environmental stress has dropped to normal operation conditions no manual intervention (on the site) is needed to restore full performance. Non destruction is normally tested with one parameter at a time exceeding the limits for normal operation. Non destruction refers to a period of not more than 96 consecutive hours, and a total of not more than 5.5 days in a 3 years period.

Non destruction - Power With requirements (D) of chapter 5.5 applied and the abnormal voltage range, performance of the fan shall result in no physical damage nor cause any internal RBS fuses to blow or circuit- breakers to trip requiring operators intervention . The fan shall automatically recover (temporary loss of function is allowed, provided the function is self-recoverable or can be restored by the operation of controls) to normal performance operation (E) after the test. Physical damage means that immediately after the tests a component part (including fuses) needs to be replaced to restore normal function to the fan.

Normal condition – Environmental

Environmental conditions where all units shall be able to function as specified.

Normal operation - PLD With requirements (E) of chapter 5.5 applied, performance of the fan shall result in no degradation of performance and no functional errors.

Supplier Includes the role of the designer, manufacturer, supplier


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and/or vendor of the product

Surge A transient wave of current, potential, or power in an electric circuit.

Qualified laboratory: An EMC laboratory with documented measuring and calibration routines according to known EMC requirements

19 Abbreviations

CB Certified Body

CISPR Comité International Special des Pertubations Radioelectriques

CSA Canadian Standards Association

DC Direct Current

EN European Norms (e.g. EN 60 950)

ETSI European Telecommunications Standardizations Institute

ISO International Standardization Organization

PLD Power Line Disturbances

QTP The Qualification Test Plan states all the qualification that will be performed

QTS The Qualification Test Specification shall in detail describe all tests required to perform a complete QT of the product.

RMS Root Mean Square

UL Underwriters Laboratory


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20 Revision history

Rev Date Change

G 2010-07-07 H 2010-11-29 J 2011-06-22 RS restructured due to R12 project.

Update is based on changes made on 1056-BKV 301 216/166 from Rev B to Rev C, with addaptions made for outdoor fan specific requirements. Dimension drawing changed All req Tags denominated “J” for revision.

K 2011-09-01 §2.5.2 Plateau introduced for MIN speed §3.2 Length of cable changed, due to new reference point in drawing § 4.1 Nominal voltage added §6.2.2 Normal temp range changed to +45°C §8.3 Nominal voltge apply for certification §9.1 Marking with the products nominal voltage §9.2 Text orientation added. Alternative to label holder added

L 2012-05-12 FAN_FU:L_04 lowered the minimum airflow Updated to fulfill 15/1056-CRX 901 187 RevG (Safety chapter not included) FAN_ENV:L_10 added to highlight corrosion requirement in /General HW/ FAN_PWM:K_05 corrected. FAN_MARK:J_08 changed to correct one New revision of PLD test document, from C to D

M 2013-01-28 FAN_FU:M_07 added FAN_PWM:M_03 note2 added FAN_ENV:M_02 note3 removed FAN_REL:M_02 added